xf86-video-modesetting: upgrade to 0.7.0

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
xf86-video-modesetting: backport fix for graphics corruption

This fixes graphics corruption that can occur when using 32 bpp pixmaps
with 24 bpp framebuffer.

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>